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Added engine

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Gnarwhal 2024-08-07 05:01:14 +00:00
commit c737011314
Signed by: Gnarwhal
GPG key ID: 0989A73D8C421174
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src/geno/gl/GenoVao.cpp Normal file
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/*******************************************************************************
*
* Copyright (c) 2018 Gnarly Narwhal
*
* -----------------------------------------------------------------------------
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files(the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*******************************************************************************/
#include "GenoGL.h"
#include "GenoVao.h"
template <typename T>
struct GenoVertexAttribType {};
template<> struct GenoVertexAttribType< int8 > { const static uint32 TYPE = GL_UNSIGNED_BYTE; };
template<> struct GenoVertexAttribType<uint8 > { const static uint32 TYPE = GL_BYTE; };
template<> struct GenoVertexAttribType< int16> { const static uint32 TYPE = GL_UNSIGNED_SHORT; };
template<> struct GenoVertexAttribType<uint16> { const static uint32 TYPE = GL_SHORT; };
template<> struct GenoVertexAttribType< int32> { const static uint32 TYPE = GL_UNSIGNED_INT; };
template<> struct GenoVertexAttribType<uint32> { const static uint32 TYPE = GL_INT; };
template<> struct GenoVertexAttribType<float > { const static uint32 TYPE = GL_FLOAT; };
template<> struct GenoVertexAttribType<double> { const static uint32 TYPE = GL_DOUBLE; };
GenoVao::GenoVao(uint32 num, float verts[], uint32 count, uint32 indices[]) {
this->count = count;
glGenVertexArrays(1, &vao);
addAttrib(num, 3, verts);
glGenBuffers(1, &ibo);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibo);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, count * sizeof(int32), indices, GL_STATIC_DRAW);
}
template <typename T>
void GenoVao::addAttrib(uint32 num, uint32 stride, T data[]) {
glBindVertexArray(vao);
glGenBuffers(1, vbos + attribs);
glBindBuffer(GL_ARRAY_BUFFER, vbos[attribs]);
glBufferData(GL_ARRAY_BUFFER, stride * num * sizeof(T), data, GL_STATIC_DRAW);
glVertexAttribPointer(attribs, stride, GenoVertexAttribType<T>::TYPE, GL_FALSE, 0, (void*) 0);
glEnableVertexAttribArray(attribs);
++attribs;
}
void GenoVao::render() {
glBindVertexArray(vao);
glDrawElements(GL_TRIANGLES, count, GL_UNSIGNED_INT, 0);
}
GenoVao::~GenoVao() {
glDeleteBuffers(attribs, vbos);
glDeleteBuffers(1, &ibo);
glDeleteVertexArrays(1, &vao);
}